The Malware tag covers malware families, infrastructure analysis, incident impact, disruption efforts, and defensive guidance to reduce cybersecurity risk.
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Background for this topic.
Malware is software intentionally created or modified to perform unauthorized or harmful actions on a computer, device, or network. The term covers distinct families and functions, including viruses, worms, trojans, spyware, botnet clients, and ransomware; a single sample may combine several capabilities. Its behavior—not its label—determines the security concern: it may execute code, persist, alter or encrypt data, steal credentials, or provide unauthorized remote access.
For practitioners, malware reporting is most useful when it identifies the family or tool conservatively and provides evidence such as affected platforms, samples, infrastructure, or observed behavior. Defenses include promptly patching vulnerable software, restricting execution and privileges, monitoring endpoints and networks, maintaining tested backups, and isolating suspected systems for analysis. Detection should use behavior and verified indicators rather than names alone, since variants change. If malware processes personal or regulated data, investigations should also address privacy, evidence preservation, and applicable reporting obligations.
BlackLotus is the first in-the-wild malware to exploit a vulnerability in the Secure Boot process on Windows, and experts expect copycats and imminent increased activity.
Led by growth in Russia, more than 40% of global ICS systems faced malicious activity in the second half of 2022.
Researchers warn that polymorphic malware created with ChatGPT and other LLMs will force a reinvention of security automation.
Two novel malware binaries, including "HiatusRAT," offer unique capabilities that point to the need for better security for companies' router infrastructure.